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The vector equation of the plane passing...

The vector equation of the plane passing through the origin and the line of intersection of the planes `vecr.veca=lamdaandvecr.vecb=mu` is

A

`r.(lamda a-mu b)= 0`

B

`r.(lamda b-mu a)=0`

C

`r.(lamda a+ mu b)= 0`

D

`r.(lamda b+mu a)= 0`

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The correct Answer is:
B
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